Pneumatic tire, puncture repair method of pneumatic tire, and vehicle

Abstract

To provide a pneumatic tire having a porous sound-proofing body in tire inner cavity and yet maintains repairability of puncture.SOLUTION: A pneumatic tire is mounted on a vehicle having a puncture repair kit containing a puncture seal agent, and allows puncture to be repaired by injecting a puncture seal agent into a tire. The pneumatic tire includes a pneumatic tire body 1A defining a tire inner cavity 1B, and a porous sound-proofing body 10 arranged in the tire inner cavity 1B. The sound-proofing body 10 is not fixed to the pneumatic tire body 1A in the tire inner cavity 1B, and is removable from the pneumatic tire body 1A. The sound-proofing body 10 has air permeability measured of 62 ml / cm2 / s or more according to JIS K 6400-7.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pneumatic tire, a method for repairing a puncture in a pneumatic tire, and a vehicle. [Background technology]

[0002] Patent Document 1 below proposes a pneumatic tire having a porous noise-damping body fixed to the inner surface of the tread portion. This pneumatic tire is expected to have an improved noise-damping effect due to the noise-damping body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-069984 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, puncture repair kits that can inject a puncture sealant into the tire cavity to seal holes in the tire when the tire is punctured have become widespread. In addition, an increasing number of vehicles are equipped with such puncture repair kits instead of spare tires.

[0005] When a pneumatic tire equipped with the above-mentioned porous noise-damping body is repaired with the above-mentioned puncture repair kit, the noise-damping body may prevent the puncture sealant from flowing into the puncture hole, thereby compromising the repairability of the puncture.

[0006] The present invention has been devised in view of the above-mentioned circumstances, and has as its main object to maintain the repairability of punctures in pneumatic tires and the like having a porous noise-damping body in the tire cavity. [Means for solving the problem]

[0007] The present invention relates to a pneumatic tire which is mounted on a vehicle equipped with a puncture repair kit containing a puncture sealant and in which a puncture can be repaired by injecting the puncture sealant into the inside of the tire, the pneumatic tire comprising a pneumatic tire body defining a tire cavity and a porous noise-damping body disposed in the tire cavity, the noise-damping body being not fixed to the pneumatic tire body within the tire cavity and being freely removable from the pneumatic tire body, the noise-damping body having an air permeability of 62 ml / cm as measured in accordance with JIS K6400-7, 2 / s or more. Effect of the Invention

[0008] By adopting the above configuration, the pneumatic tire of the present invention can maintain the repairability of a puncture. [Brief description of the drawings]

[0009] [Figure 1] 1 is a tire meridian cross-sectional view showing one embodiment of a pneumatic tire of the present invention. [Diagram 2] FIG. 2 is an enlarged perspective view of the pneumatic tire body and the noise damper of FIG. 1. [Diagram 3] FIG. 2 is an enlarged cross-sectional view of the noise damper of FIG. 1. [Figure 4] FIG. 2 is a conceptual diagram showing a side surface of the tire of FIG. [Diagram 5] FIG. 4 is a conceptual diagram showing a side surface of a tire according to another embodiment. [Figure 6] FIG. 11 is an enlarged cross-sectional view of a noise damper according to another embodiment. [Figure 7] FIG. 2 is a conceptual diagram of a puncture repair kit used in the present invention. [Figure 8] 1 is a flowchart of a method for repairing a puncture in a pneumatic tire according to the present invention. [Figure 9] 1 is a conceptual diagram showing a vehicle equipped with a pneumatic tire according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drawings are described to include the features of the present invention, but may include exaggerated expressions and expressions different from the dimensional ratios of the actual structure in order to facilitate understanding of the present invention. In addition, the same reference numerals are used to refer to the same or common elements throughout the embodiments, and duplicated explanations will be omitted.

[0011] FIG. 1 is a tire meridian cross-sectional view of a pneumatic tire (hereinafter, sometimes simply referred to as "tire") 1 in a normal state, showing one embodiment of the present invention. Note that FIG. 1 is a diagram showing a cross-section of tire 1 when tire 1 extending in an annular shape is cut along an imaginary plane that passes through the tire rotation axis and is perpendicular to the tire circumferential direction. As shown in FIG. 1, in this embodiment, a pneumatic tire 1 for passenger cars is shown. However, the present invention may also be applied to a pneumatic tire 1 for heavy loads, for example.

[0012] In the case of a pneumatic tire for which various standards are established, the "normal state" refers to a state in which the tire is mounted on a normal rim, inflated to a normal internal pressure, and no load is applied. In the case of a tire for which various standards are not established, the normal state refers to a standard use state according to the intended use of the tire, in which the tire is not mounted on a vehicle and no load is applied. In this specification, unless otherwise specified, the dimensions of each part of the tire are values ​​measured in the normal state.

[0013] A "genuine rim" is a rim that is defined for each tire by the standard system that includes the standard on which the tire is based. For example, in the case of JATMA, it is called a "standard rim," in the case of TRA, it is called a "Design Rim," and in the case of ETRTO, it is called a "Measuring Rim."

[0014] "Normal internal pressure" is the air pressure set for each tire by each standard in the standard system on which the tire is based. In the case of JATMA, it is the "maximum air pressure." In the case of TRA, it is the maximum value listed in the table "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES." In the case of ETRTO, it is the "INFLATION PRESSURE."

[0015] The tire 1 of the present invention is mounted on a vehicle equipped with a puncture repair kit containing a puncture sealant. The puncture repair kit performs puncture repair by injecting the puncture sealant through the air valve of the punctured tire. The puncture sealant injected into the tire can solidify and seal the puncture hole when passing through the puncture hole. In addition, the tire 1 of the present invention can be punctured by injecting the puncture sealant into the tire through the air valve as described above. For this reason, the tire 1 of the present invention has a rigidity in the tread portion 2 such that the sealed puncture hole does not reopen even when the vehicle is driven after the puncture is repaired, and specifically, the tire 1 of the present invention includes at least a carcass 6 and a belt layer 7 described below.

[0016] The carcass 6 extends from the bead portion 4 on one side through the sidewall portion 3 on one side, the tread portion 2, and the sidewall portion 3 on the other side to the bead portion 4 on the other side. The carcass 6 has at least one carcass ply 6A, two in this embodiment. The carcass ply 6A is formed, for example, by covering an array of carcass cords with a topping rubber. The carcass cords are arranged, for example, at an angle of 75 to 90° with respect to the tire circumferential direction. For the carcass cords, organic fibers such as polyester fibers, nylon fibers, rayon fibers, polyethylene naphthalate fibers, and aramid fibers are used.

[0017] The carcass ply 6A includes, for example, a main body portion 6a and a turned-up portion 6b. The main body portion extends from the tread portion 2 through the sidewall portion 3 to the bead cores 5. The turned-up portions 6b are continuous with the main body portion 6a and are turned around the bead cores 5 from the axially inner side to the outer side to extend radially outward.

[0018] The belt layer 7 is disposed on the tire radial direction outer side of the carcass 6 in the tread portion 2. The belt layer 7 includes at least one belt ply, and the belt layer 7 in this embodiment is composed of two belt plies 7A and 7B. The belt plies 7A and 7B are formed, for example, by covering an arrangement of belt cords with a topping rubber.

[0019] The tire 1 of the present invention includes a pneumatic tire body 1A that defines a tire cavity 1B, and a porous noise-damping body 10 disposed in the tire cavity 1B. This noise-damping body 10 can absorb air vibrations inside the tire 1 while the tire is running, and is useful for reducing noise generated by the tire.

[0020] On the other hand, in the past, when a pneumatic tire equipped with a porous sound-damping body was repaired with the above-mentioned puncture repair kit, the sound-damping body could prevent the puncture sealant from flowing into the puncture hole, impairing the repairability of the puncture. Specifically, the porous sound-damping body could absorb a part of the puncture sealant, making it difficult for the puncture sealant to reach the puncture hole.

[0021] In contrast, the noise damper 10 of the present invention is not fixed to the pneumatic tire body 1A within the tire cavity 1B, and is freely removable from the pneumatic tire body 1A. In addition, the noise damper 10 of the present invention has an air permeability of 62 ml / cm as measured in accordance with JIS K6400-7. 2 / s or more.

[0022] As described above, in the present invention, the noise damper 10 is detachable from the pneumatic tire body 1A, so the puncture sealant can easily reach the puncture hole. Also, in the present invention, the noise damper 10 has high breathability as described above, so even if the puncture sealant is absorbed into the noise damper 10, it easily seeps out again, so the movement of the puncture sealant toward the puncture hole is hardly impeded. This makes it possible to reliably maintain the repairability of the puncture.

[0023] Furthermore, in the past, when a pneumatic tire equipped with a porous sound-damping body was repaired with the above-mentioned puncture repair kit, a portion of the puncture sealant was also absorbed by the sound-damping body, locally increasing the weight of the sound-damping body. Such a weight imbalance of the sound-damping body increases the vibration of the tire while it is running, so that the tire had to be replaced after the puncture was repaired. In contrast, in the present invention, after the above-mentioned puncture repair, the sound-damping body 10 that has absorbed a portion of the puncture sealant can be easily removed from the pneumatic tire body 1A, and the vibration during running is suppressed, allowing the tire to continue to be used.

[0024] A more detailed configuration of this embodiment will be described below. Each configuration described below shows a specific aspect of this embodiment. Therefore, it goes without saying that the present invention can achieve the above-mentioned effects even if it does not have the configuration described below. In addition, even if any one of the configurations described below is applied alone to the tire of the present invention having the above-mentioned characteristics, an improvement in performance according to each configuration can be expected. Furthermore, when some of the configurations described below are applied in combination, a composite improvement in performance according to each configuration can be expected.

[0025] Unless otherwise specified, the dimensions of the noise damper 10 described below are measured when the tire 1 is not mounted on the rim, the distance between the pair of bead cores 5 is in the normal state described above, and the noise damper 10 is disposed in the tire cavity 1B.

[0026] For example, a porous sponge material is used for the noise damper 10. The sponge material used may be, for example, one having open cells formed by foaming rubber or synthetic resin. In a preferred embodiment, a polyurethane sponge having both ether bonds and ester bonds is used for the noise damper 10. In order to ensure sufficient durability of the noise damper 10, the air permeability of the noise damper 10 is set to 200 ml / cm. 2 / s or less is preferable, and 179 ml / cm 2 / s or less. However, the present invention is not limited to such an embodiment.

[0027] FIG. 2 shows an enlarged perspective view of the pneumatic tire main body 1A and the noise damper 10 in FIG. 1. As shown in FIG. 2, the noise damper 10 is in contact with (but not fixed to) the surface of the tread portion 2 on the tire cavity 1B side. The noise damper 10 has a flat outer surface in the tire radial direction. The noise damper 10 has a rectangular cross section perpendicular to the tire circumferential direction. In a preferred embodiment, the cross section of the noise damper 10 is a rectangular shape that is elongated horizontally in the tire axial direction. The noise damper 10 is in contact with substantially the entire tire cavity 1B (80% or more) in the tire circumferential direction. Such a noise damper 10 can exhibit excellent noise damping effect and durability.

[0028] Fig. 3 shows an enlarged cross-sectional view of the noise damper 10. As shown in Fig. 3, the maximum thickness t1 of the noise damper 10 in the tire radial direction is 10 to 40 mm. The maximum width W1 of the noise damper 10 in the tire axial direction is 20% to 80% of the cross-sectional width Wt (shown in Fig. 1) of the pneumatic tire main body 1A, and preferably 20% to 40%. Such a noise damper 10 is unlikely to separate from the pneumatic tire main body 1A while the tire is running. This suppresses wear of the noise damper 10.

[0029] FIG. 4 shows a conceptual diagram of the side of the tire 1. In FIG. 4, the noise damper 10 is shown by a dashed line. As shown in FIG. 4, the noise damper 10 of this embodiment has an annular structure including a first end 10a in the tire circumferential direction, a second end 10b in the tire circumferential direction, and a fixing portion 13 that fixes the first end 10a and the second end 10b. In FIG. 4, the fixing portion 13 is dotted. Such a noise damper 10 can prevent the end of the noise damper 10 from coming into contact with the rim or the like and wearing down, and can obtain excellent durability.

[0030] The first end 10a and the second end 10b are fixed to each other by, for example, an adhesive. In another embodiment, the first end 10a and the second end 10b may be welded to each other (by melting the sponge material with heat and then bonding them together).

[0031] In this embodiment, the annular noise damper 10 is slightly compressed and disposed within the tire cavity 1B, so that the noise damper 10 does not locally rise from the pneumatic tire main body 1A, and 90% or more, preferably the entirety, of the outer surface 10s in the tire radial direction of the noise damper 10 is in contact with the pneumatic tire main body 1A. Even if this type of noise damper 10 is not fixed to the pneumatic tire main body 1A, it can rotate together with the tire 1, making it less susceptible to wear and improving durability.

[0032] From the viewpoint of realizing the above-mentioned aspect, in a natural state in which the first end 10a and the second end 10b of the noise damper 10 are released from their fastening and are stretched linearly on a plane, the maximum length from the first end 10a to the second end 10b of the noise damper 10 is desirably 94% to 107% of the maximum circumferential length of the tire cavity 1B (shown in FIG. 1). Note that the maximum circumferential length of the tire cavity 1B means the maximum length in the tire circumferential direction on the inner surface of the pneumatic tire main body 1A. In this embodiment in which the tread portion 2 is curved convexly outward in the tire direction, the circumferential length of a circle formed by the intersection of the inner surface of the pneumatic tire main body 1A and the tire equatorial plane corresponds to the maximum circumferential length.

[0033] Fig. 5 shows a side view of a tire 1 in another embodiment. As shown in Fig. 5, the noise damper 10 in this embodiment has a non-annular structure having a first end 10a in the tire circumferential direction and a second end 10b in the tire circumferential direction that is not fixed to the first end 10a. Such a noise damper 10 helps to facilitate replacement work after using a puncture sealant.

[0034] The maximum length from the first end 10a to the second end 10b of the noise damper 10 is desirably 85% to 99% of the maximum circumferential length of the tire cavity 1B. This makes it possible to easily replace the noise damper 10 while still providing a sufficient noise damping effect.

[0035] FIG. 6 shows an enlarged cross-sectional view of a noise damper 10 of still another embodiment. As shown in FIG. 6, the noise damper 10 of this embodiment has at least one groove 15 formed on the outer surface 10s in the tire radial direction (the surface on the tire cavity 1B side). In a desirable embodiment, a plurality of the grooves 15 extending continuously in the tire circumferential direction are provided in the tire axial direction. The opening width W2 of the groove 15 is 3% to 10% of the maximum width W1 of the noise damper 10 in the tire axial direction. The depth d1 of the groove 15 is, for example, 15% to 20% of the maximum thickness t1 of the noise damper 10. Such a groove 15 makes it easier for a puncture sealant to reach the puncture hole when repairing a puncture.

[0036] The groove 15 is not limited to the above-mentioned embodiment, and may extend in the tire axial direction (not shown), for example. Such a groove 15 can facilitate the movement of the puncture sealant in the tire axial direction, for example, and can further enhance the above-mentioned effect.

[0037] A second aspect of the present invention is a method for repairing a puncture in the pneumatic tire 1 described above. Fig. 7 shows a conceptual diagram of a puncture repair kit 20 used in the present invention. In Fig. 7, the puncture repair kit 20 is drawn larger than the actual size compared to the tire 1. This puncture repair kit 20 includes a bottle unit 21 containing a puncture sealant, and a compressor 22 capable of supplying high-pressure air. It is preferable that the bottle unit 21 is attached to the compressor 22 when used.

[0038] A flowchart of the method for repairing a puncture in a pneumatic tire according to the present invention is shown in Fig. 8. As shown in Fig. 8, the method for repairing a puncture in a pneumatic tire includes at least a first step S1 and a second step S2, which will be described below.

[0039] In the first step S1, as in the conventional method, for example, a puncture repair kit 20 shown in Fig. 7 is used to inject a puncture sealant into the tire cavity, filling the puncture hole with the puncture sealant. After that, the tire air pressure is appropriately adjusted, and the vehicle can be driven as usual.

[0040] Conventionally, some of the puncture sealant is also absorbed by the noise-damping body, which increases tire vibrations during driving after the first step S1 described above, making it necessary to change the tire even if there are no problems with other parts of the tire.

[0041] In contrast, in the second step S2 of the puncture repair method of the present invention, the noise damper that has absorbed a portion of the puncture sealant filled in the tire cavity 1B is removed from the pneumatic tire body 1A. In the present invention, this operation can be easily performed because the noise damper 10 is not fixed to the tire cavity 1B. Therefore, the tire can be used continuously after the puncture repair.

[0042] The puncture repair method of the present invention preferably further includes a third step S3 of placing a new noise damper that has not absorbed the puncture sealant in the tire cavity after the second step S2, thereby making it possible to continue using the tire after recovering the noise damping effect.

[0043] However, the present invention is not limited to the above embodiment. In another embodiment, after the second step S2, the pneumatic tire body 1A may be used without disposing a new noise damper 10. In addition, the puncture repair method of the present invention may include a step of removing the puncture sealant remaining in the tire cavity 1B.

[0044] 9 shows a conceptual diagram of a vehicle 25 fitted with the pneumatic tire 1 of the present invention. This vehicle is fitted with the above-mentioned tire 1 (shown in FIG. 1) and includes the above-mentioned puncture repair kit 20 (shown in FIG. 7). Therefore, this vehicle 25 can maintain the repairability of the puncture, and the tire can be used continuously even after the puncture has been repaired.

[0045] It should be noted that this vehicle 25 does not have a spare tire, but is instead fitted with the above-mentioned tire 1 and includes the above-mentioned puncture repair kit 20. Vehicles that do not have a spare tire are expected to have improved fuel efficiency and also enable a larger interior space to be secured.

[0046] Although the pneumatic tire and the like according to one embodiment of the present invention have been described in detail above, the present invention is not limited to the above-described specific embodiment and can be modified and implemented in various aspects. EXAMPLES

[0047] A pneumatic tire having a size of 215 / 55R17 and having the basic structure shown in FIG. 1 and based on the specifications shown in Table 1 was manufactured. In addition, as a comparative example, a pneumatic tire having a sound damping body with a breathability of 42 ml / cm 2 Pneumatic tires having a tread width of 100 mm / s were produced as prototypes. The comparative tire was substantially the same as the example tire except for the above points. An air seal test was carried out on these test tires. The common specifications and test methods for each test tire are as follows: Rim: 17×7.5J Tire pressure: 250kPa

[0048] <Air seal test> A puncture hole was created by piercing a nail with a diameter of 5 mm into the center of the tread of the test tire, and then the nail was removed and 400 ml of puncture sealant was immediately injected into the tire cavity. Immediately after that, the tire internal pressure was adjusted to 250 kPa and the tire was driven for 15 minutes at a speed of 30 to 60 km / h on a drum test machine, after which it was checked to see if air had leaked from the puncture hole. If there was no air leakage, the tire passed the test. The test results are shown in Table 1.

[0049] [Table 1]

[0050] As shown in Table 1, the comparative example failed the air seal test, while the tire of the example passed the air seal test because the puncture sealant easily reached the puncture hole due to the high breathability of the sound damper. In other words, it was confirmed that the tire of the example maintained the repairability of the puncture.

[0051] [Note] The present invention includes the following aspects.

[0052] [Invention 1] A pneumatic tire that is mounted on a vehicle equipped with a puncture repair kit including a puncture sealant, and that can be punctured by injecting the puncture sealant into the tire, A pneumatic tire body defining a tire cavity and a porous noise-damping body disposed in the tire cavity, The noise damper is not fixed to the pneumatic tire body within the tire cavity and is freely removable from the pneumatic tire body, The sound damper has an air permeability of 62 ml / cm as measured in accordance with JIS K6400-7. 2 / s or more, Pneumatic tires. [Invention 2] The pneumatic tire described in Invention 1, wherein the noise damper has an annular structure including a first end in the tire circumferential direction, a second end in the tire circumferential direction, and a fixing portion that fixes the first end and the second end. [Invention 3] The pneumatic tire according to the present invention 2, wherein in a natural state in which the first end and the second end of the noise damper are released from their fastening, the maximum length from the first end to the second end of the noise damper is 94% to 107% of the maximum circumference of the tire cavity. [Invention 4] The pneumatic tire described in Invention 1, wherein the noise damper has a non-annular structure having a first end in the tire circumferential direction and a second end in the tire circumferential direction that is not fixed to the first end. [Invention 5] The pneumatic tire according to invention 4, wherein the maximum length from the first end to the second end of the noise damper is 85% to 99% of the maximum circumference of the tire cavity. [Invention 6] The pneumatic tire according to any one of claims 1 to 5, wherein the noise damper has a flat outer surface on the outer side in the tire radial direction. [Invention 7] The noise damper is made of a polyurethane sponge having both an ether bond and an ester bond. [Invention 8] The pneumatic tire according to any one of Inventions 1 to 7, wherein the maximum thickness of the noise damper in the tire radial direction is 10 to 40 mm. [The present invention 9] The pneumatic tire according to any one of claims 1 to 8, wherein the maximum width of the noise damper in the tire axial direction is 20% to 80% of the cross-sectional width of the pneumatic tire body. [The present invention 10] 10. The pneumatic tire according to any one of claims 1 to 9, wherein the noise damper has a rectangular cross section perpendicular to the circumferential direction of the tire. [The present invention 11] A method for repairing a puncture in a pneumatic tire, comprising the steps of: The pneumatic tire includes a pneumatic tire body defining a tire cavity, and a porous noise-damping body disposed in the tire cavity, The noise damper is not fixed to the pneumatic tire body within the tire cavity and is freely removable from the pneumatic tire body, The puncture repair method includes a first step of injecting a puncture sealant into the tire cavity and filling the puncture hole with the puncture sealant; and a second step of removing the noise damper that has absorbed a portion of the puncture sealant filled in the tire cavity from the pneumatic tire body. How to repair a punctured pneumatic tire. [The present invention 12] The method for repairing a puncture in a pneumatic tire according to the present invention 11, further comprising a third step of placing a new noise damper that has not absorbed the puncture sealant in the tire cavity after the second step. [The present invention 13] 12. The method for repairing a puncture in a pneumatic tire according to claim 11, wherein after the second step, no new noise damper is disposed on the pneumatic tire body. [Invention 14] A vehicle equipped with pneumatic tires, a puncture repair kit for repairing a puncture in the pneumatic tire, the puncture repair kit being configured to inject a puncture sealant into a tire cavity when the pneumatic tire is punctured; The pneumatic tire includes a pneumatic tire body defining a tire cavity, and a porous noise-damping body disposed in the tire cavity, The noise damper is not fixed to the pneumatic tire body within the tire cavity and is freely removable from the pneumatic tire body. vehicle. [The present invention 15] 15. A vehicle as described in the present invention, not equipped with a spare tire. [Explanation of symbols]

[0053] 1A Pneumatic tire body 1B Tire Cavity 10 Damper

Claims

1. A pneumatic tire that is mounted on a vehicle equipped with a puncture repair kit including a puncture sealant, and that can be punctured by injecting the puncture sealant into the tire, A pneumatic tire body defining a tire cavity and a porous noise-damping body disposed in the tire cavity, The noise damper is not fixed to the pneumatic tire body within the tire cavity and is freely removable from the pneumatic tire body, The sound damper has an air permeability of 62 ml / cm as measured in accordance with JIS K6400-7. 2 / s or more, Pneumatic tires.

2. 2. The pneumatic tire according to claim 1, wherein the noise damper has an annular structure including a first end in a tire circumferential direction, a second end in the tire circumferential direction, and a fastening portion that fastens the first end and the second end.

3. 3. The pneumatic tire according to claim 2, wherein in a natural state in which the first end and the second end of the noise damper are released from their fastening, the maximum length from the first end to the second end of the noise damper is 94% to 107% of the maximum circumference of the tire cavity.

4. 2. The pneumatic tire according to claim 1, wherein the noise damper has a non-annular structure having a first end in a tire circumferential direction and a second end in the tire circumferential direction that is not fixed to the first end.

5. 5. The pneumatic tire according to claim 4, wherein a maximum length from the first end to the second end of the noise damper is 85% to 99% of a maximum circumference of the tire cavity.

6. The pneumatic tire according to claim 1 , wherein the noise damper has an outer surface on an outer side in the tire radial direction that is flat.

7. The sound damper is made of a polyurethane sponge having both ether bonds and ester bonds. The pneumatic tire according to any one of claims 1 to 5.

8. 6. The pneumatic tire according to claim 1, wherein the maximum thickness of the noise damper in the tire radial direction is 10 to 40 mm.

9. 6. The pneumatic tire according to claim 1, wherein a maximum width of the noise damper in the tire axial direction is 20% to 80% of a cross-sectional width of the pneumatic tire body.

10. The pneumatic tire according to claim 1 , wherein the noise damper has a rectangular cross section perpendicular to the circumferential direction of the tire.

11. A method for repairing a puncture in a pneumatic tire, comprising the steps of: The pneumatic tire includes a pneumatic tire body defining a tire cavity, and a porous noise-damping body disposed in the tire cavity, The noise damper is not fixed to the pneumatic tire body within the tire cavity and is freely removable from the pneumatic tire body, The puncture repair method includes a first step of injecting a puncture sealant into the tire cavity and filling the puncture hole with the puncture sealant; and a second step of removing the noise damper that has absorbed a portion of the puncture sealant filled in the tire cavity from the pneumatic tire body. How to repair a punctured pneumatic tire.

12. 12. The method for repairing a puncture in a pneumatic tire according to claim 11, further comprising a third step of placing a new noise damper that has not absorbed the puncture sealant in the tire cavity after the second step.

13. The method for repairing a puncture in a pneumatic tire according to claim 11, wherein after the second step, no new noise damper is disposed on the pneumatic tire body.

14. A vehicle equipped with pneumatic tires, a puncture repair kit for repairing a puncture in the pneumatic tire, the puncture repair kit being configured to inject a puncture sealant into a tire cavity when the pneumatic tire is punctured; The pneumatic tire includes a pneumatic tire body defining a tire cavity, and a porous noise-damping body disposed in the tire cavity, The noise damper is not fixed to the pneumatic tire body within the tire cavity and is freely removable from the pneumatic tire body. vehicle.

15. 15. A vehicle as claimed in claim 14, which does not include a spare tire.

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